EP2769758B1 - Filterelement - Google Patents

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Publication number
EP2769758B1
EP2769758B1 EP14151902.5A EP14151902A EP2769758B1 EP 2769758 B1 EP2769758 B1 EP 2769758B1 EP 14151902 A EP14151902 A EP 14151902A EP 2769758 B1 EP2769758 B1 EP 2769758B1
Authority
EP
European Patent Office
Prior art keywords
comb
filter
filter element
shaped member
frame body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP14151902.5A
Other languages
English (en)
French (fr)
Other versions
EP2769758A1 (de
Inventor
Yosuke Hio
Taisuke Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Roki Co Ltd
Original Assignee
Roki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Roki Co Ltd filed Critical Roki Co Ltd
Publication of EP2769758A1 publication Critical patent/EP2769758A1/de
Application granted granted Critical
Publication of EP2769758B1 publication Critical patent/EP2769758B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B01D29/07—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported with corrugated, folded or wound filtering sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/12—Pleated filters
    • B01D2201/127—Pleated filters with means for keeping the spacing between the pleats

Definitions

  • the present invention relates to a filter element, and more particularly, to a filter element mounted to an air cleaner, an oil strainer or like applicable to an internal combustion engine.
  • a filter element provided with a filter member that is formed by folding a non-woven fabric (unwoven cloth) or filter paper along a width direction thereof to provide pleated-shape (which may be called hereinafter pleated filter member or merely filter member) and a holder frame that holds or supports an outer edge portion of the pleated filter member.
  • Patent Document 1 Japanese Patent Laid-open Publication No. 2002-273116
  • a filter element disclosed in this Patent Document 1 is a filter element that is provided with a pleated filter member and a reinforcing rib made of synthetic resin formed integrally with the filter member.
  • the reinforcing rib is provided so as to extend from one end to the other end of the filter element in a direction perpendicularly intersecting a pleated direction on the center line of the pleated side line of the filter member except a peripheral edge portion of the filter member.
  • the filter element disclosed in the Patent Document 1 is formed from a frame body or frame member integrally formed with the peripheral edge portion of the filter member and a reinforcing rib extending from one end to the other end of the filter member in the pleated direction except the peripheral edge portion thereof with the synthetic resin integrally with each other. According to this structure, it becomes possible to prevent close-contact or direct-contact of adjacent gathers of the pleated lines at a fluid-flow time, thereby keeping large effective filtrating area and maintaining the pleated shape and rigidity of the frame body.
  • the filter element described above is formed from the frame body and the reinforcing rib which are formed integrally with the same synthetic resin, and when the frame body and the reinforcing rib are formed by injection molding process, the filter member is manufactured by insert-molding process.
  • the filter member since the filter member is disposed in a mold, the mold is clamped, and then, synthetic resin fused in the mold is injected, the filter member and the reinforcing rib can thus be integrally formed.
  • the filter member and the reinforcing rib can be simultaneously formed, the number of parts or steps of manufacturing working can be eliminated or decreased, contributing to cost saving.
  • the filter element In the thus formed filter element, a portion of the filter member compressed by the mold is clogged, which results in increasing in resistance against filtration, and hence, reducing the effective filtrating area, thus providing a problem. More particularly, in the filter element in which the reinforcing rib is formed integrally with the filter member, it is necessary to compress both the sides of the reinforcing rib, and accordingly, an area to be compressed increases, which leads enlargement of the filter element in size and results in diffculty for ensuring an effective filtrating area without enlarging the filter element.
  • US 2013/008845 A1 discloses a fluid filter including an upper case member having a flow outlet; a lower case member having a flow inlet; a filter element having a folded filter material and a holding frame which holds the circumferential part of the filter material and is sandwiched between the upper case member and the lower case member; and a reinforcing member provided to extend in a direction crossing the ridge line direction of the folds of the filter material.
  • the present invention was conceived in consideration of the circumstances in the prior art mentioned above, and an object thereof is to provide a filter element capable of ensuring an effective filtrating area without increasing a size of the filter element by suppressing reducing of the effective filtrating area by a pressure compressed by a mold even in a case where a reinforcing rib is formed in a frame body.
  • the present invention provides a filter element according to claim 1. Further embodiments of the present invention are described in the dependent claims.
  • a flat filter element which includes a filter member provided with a plurality of pleat portions and a frame body holding an outer peripheral portion of the filter member, wherein the frame body is provided with a comb-shaped member having a comb-tooth portion which is inserted into adjacent pleat portions and contacts to a surface of the filter member, and the comb-shaped member is formed by an insert-molding process.
  • a projection is formed to at least one end of the comb-shaped member so as to extend in a longitudinal direction thereof. The projection is firmly embedded into the frame body.
  • the comb-shaped member is disposed in a clean side of the filter member.
  • the frame body is formed with holding portions which hold outer peripheral edges of both ends of the comb-shaped member in the longitudinal direction thereof.
  • the comb-tooth portion has a tip end formed in circular-arc shape.
  • the filter element of the present invention since the comb-shaped member, which has comb-tooth portions each of which is inserted into adjacent pleat portions of the filter member and contacts the surface of the filter member, is formed by means of the insert-molding process, the comb-shaped member formed separately from the frame body can be insert-molded together, and after the insert-molding, the comb-shaped member functions as like as reinforcing rib, and accordingly, without compressing the surface of the filter member by the mold, the filter element having a reinforcing rib can be formed, so that the reduction of the effective filtrating area due to the mold compression can be suppressed and the effective filtrating area can be ensured without making large the filter element.
  • the comb-shaped member is arranged on the clean side of the filter member, the comb-shaped member and the filter member can be prevented from being separated from each other by the filtration of fluid.
  • the comb-shaped member since the projection is formed to at least one end of the comb-shaped member so as to extend in the longitudinal direction thereof, the comb-shaped member can be integrally fixed to the frame body by such projection.
  • the projection since the projection is firmly embedded into the frame body, the comb-shaped member can be integrally fixed to the frame body, and even if an external force is applied, the filter element cannot be easily damaged and can be firmly reinforced.
  • the frame body is formed with holding portions which hold the outer peripheral edges of both ends of the comb-shaped member in the longitudinal direction thereof, the comb-shaped member can be prevented from falling off from the frame body, and the comb-shaped member and the frame body can be surely integrated.
  • the filter ember since the tip end of the comb-tooth portion is formed so as to proved circular-arc shape, the filter ember can be prevented from being damaged by the tip end when inserted and also prevent the adjacent pleat portions from being stuck to each other to thereby prevent increase in the ventilation resistance.
  • the filter element 10 is provided with filter member 20 and a frame body 30 having outer peripheral edge portions extending in longitudinal and width directions in a manner such that the frame body supports the outer peripheral edge portions of the filter member 20.
  • the filter member 20 is formed of a sheet-shaped filter paper or a non-woven fabric which is pleated in a fashion such that predetermined mount portions and valley portions of the pleated structure are alternately arranged along the width direction of the filter paper or non-woven fabric.
  • the frame body 30 has a clean side formed with a flanged portion 32 projecting outward along the outer peripheral edge portion by which the filter element 10 is settled in position when it is mounted to an objective member or parts.
  • a comb-shaped member 40 is mounted to the clean side of the filter member 20 along the longitudinal direction of the frame body 30 so as to abut against the surface 22 of the filter member 20.
  • the comb-shaped member 40 is arranged only on the clean side and not arranged on a dust side of the filter element 10 as shown in Fig. 2 .
  • the filter element 10 filtrate a fluid during the flow of the fluid from the dust side to the clean side of the filter element 10, and accordingly, by arranging the comb-shaped member 40 on the clean side, a force is applied in the direction in which the filter ember 20 and the comb-shaped member 40 tightly contact to each other by the filtration of the fluid.
  • a force is applied in the direction in which the filter ember 20 and the comb-shaped member 40 tightly contact to each other by the filtration of the fluid.
  • the comb-shaped member 40 is provided with a comb-tooth portion having teeth 41 and a comb-tooth body 43.
  • the teeth 41 of the comb-tooth portion are arranged in correspondence to pleats 21 of a pleated portion of the filter member 20 in a manner such that each tooth 41 can be inserted into a portion between the adjacent pleats 21.
  • the comb-tooth portion 41 and the comb-tooth body 43 are integrally formed as comb-shaped member 40 which is also provided with projections 42 projecting outward in the longitudinal direction from both ends of the comb-shaped member 40.
  • each of the teeth 41 is formed so as to provide a circular-arc shape to thereby prevent the adjacent pleats 21, 21 from being stick to each other at the time of passing the fluid, as well as from damaging the surface 22 of the filter member 20 when being inserted.
  • such circular-arc shape has a predetermined curvature so as to prevent the sticking of the adjacent pleats 21, which will be optionally set in accordance with a size of the filter member 20 or an interval between the adjacent pleats 21, 21.
  • holding portions 31 are formed to both the ends of the comb-shaped member 40 at which the holding portions 31 continuously contact so as to surround the outer peripheral edges of the ends of the comb-shaped member 40 and to firmly embed the projections 42 into the frame body 30, thereby firmly holding the comb-shaped member 40 not to be movable in all the directions including longitudinal, width and vertical directions, thus the comb-shaped member 40 and the frame body 30 being assembled integrally.
  • the filter element 10 of the present embodiment is manufactured by performing the insert-molding process to the filter member 20 and the comb-shaped member 40 at the time of forming the frame body 30 through the injection molding process.
  • the manufacturing method of the present embodiment in which the filter member 20 and the comb-shaped member 40 are formed through the insert-molding process differs from a conventional insert-molding method in which a filter element is composed of a reinforcing member and a frame body which are integrally formed.
  • the synthetic resin fused in the filter member 20 does not seep from the boundary between the filter member 20 and the comb-shaped member 40, or does not project as burr on the surface of the filter member 20, by the injection pressure without compressing, in the mold, both the side portions of the comb-shaped member 40 at the time of insert-molding process, and therefore, it becomes possible to ensure the effective filtrating area without enlarging the size of the filter member 20.
  • each of the comb-tooth portions 41 is inserted into the adjacent two pleats 21, the comb-tooth portions 41 attain the same function as that attained by the conventional reinforcing rib to thereby prevent the sticking of the adjacent pleats 21 to each other, thus improving the filtrating performance and reducing resistance against fluid flow.
  • the frame body 30 and the comb-shaped member 40 are formed of synthetic resin, they may be formed of thermoplastic synthetic resin such as polypropylene series resin or polyamide series resin, for example.
  • the comb-shaped member 40 of the filter element of the present embodiment is arranged so as to abut against the surface 22 of the filter member 20, the comb-shaped member 40 may be bonded to the surface 22 of the filter member 20 by a bonding agent or like.
  • the number of the comb-shaped member 40 to be used is not limited to the described one, and two or more than two comb-shaped members 40 may be used for manufacturing a wide-shaped filter element, large-sized filter element and so on.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtration Of Liquid (AREA)
  • Filtering Materials (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)

Claims (4)

  1. Flaches Filterelement (10) aufweisend:
    ein Filterteil (20), das mit einer Mehrzahl von Faltenabschnitten (21) versehen ist, und
    einen Rahmenkörper (30), der einen Außenumfangsabschnitt des Filterteils (20) hält,
    wobei der Rahmenkörper (30) mit einem kammförmigen Teil (40) versehen ist, das einen Kammzahnabschnitt (41) aufweist, welcher in benachbarte Faltenabschnitte (21) eingefügt ist und eine Fläche (22) des Filterteils (40) kontaktiert, und das kammförmige Teil durch einen Umspritzprozess gebildet ist,
    gekennzeichnet dadurch, dass
    ein Vorsprung (42) an mindestens einem Ende des kammförmigen Teils (40) gebildet ist, sodass er sich in einer Längsrichtung davon erstreckt,
    wobei der Vorsprung (42) fest in dem Rahmenkörper (30) eingebettet ist.
  2. Filterelement (10) gemäß Anspruch 1, wobei das kammförmige Teil (40) in einer Reinseite des Filterteils (20) angeordnet ist.
  3. Filterelement (10) gemäß Anspruch 1 oder 2, wobei der Rahmenkörper (30) mit Halteabschnitten (31) gebildet ist, die Außenumfangsränder beider Enden des kammförmigen Teils (40) in der Längsrichtung davon halten.
  4. Filterelement (10) gemäß irgendeinem der Ansprüche 1 bis 3, wobei der Kammzahnabschnitt (41) ein Spitzenende hat, das kreisbogenförmig gebildet ist.
EP14151902.5A 2013-02-21 2014-01-21 Filterelement Active EP2769758B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013032277A JP6263331B2 (ja) 2013-02-21 2013-02-21 フィルタエレメント

Publications (2)

Publication Number Publication Date
EP2769758A1 EP2769758A1 (de) 2014-08-27
EP2769758B1 true EP2769758B1 (de) 2017-03-22

Family

ID=49989562

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14151902.5A Active EP2769758B1 (de) 2013-02-21 2014-01-21 Filterelement

Country Status (5)

Country Link
US (1) US9283509B2 (de)
EP (1) EP2769758B1 (de)
JP (1) JP6263331B2 (de)
CN (1) CN104001372A (de)
ES (1) ES2623415T3 (de)

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CN104307231B (zh) * 2014-11-06 2016-02-24 梁建波 平衡式简易过滤装置
US20170268393A1 (en) * 2016-03-21 2017-09-21 Ford Global Technologies, Llc Transmission Oil Filter Assembly
CN106593583A (zh) * 2016-12-29 2017-04-26 北京航空航天大学 一种折叠型滤芯的颗粒物捕集器
WO2018213444A1 (en) * 2017-05-16 2018-11-22 Xylem Water Solutions Zelienople Llc Self-cleaning, groutless, filter underdrain
DE102018119684A1 (de) 2018-08-14 2020-02-20 Dürr Systems Ag Filterstrukturkörper und Filtermodul zum Abscheiden von Verunreinigungen aus einem Rohfluidstrom
DE102021000515B3 (de) * 2021-02-02 2022-03-24 Daimler Ag Filterelement für eine Luftfiltereinrichtung eines Kraftwagens und Luftfiltereinrichtung
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US11478027B2 (en) * 2020-07-01 2022-10-25 Nypro Inc. Face mask with replaceable filter cartridges and components

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Also Published As

Publication number Publication date
US20140230388A1 (en) 2014-08-21
ES2623415T3 (es) 2017-07-11
US9283509B2 (en) 2016-03-15
EP2769758A1 (de) 2014-08-27
CN104001372A (zh) 2014-08-27
JP2014161752A (ja) 2014-09-08
JP6263331B2 (ja) 2018-01-17

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